<template>
  <svg aria-hidden="true" :class="svgClass">
    <use :xlink:href="symbolId" :fill="props.color" />
  </svg>
</template>
   
  <script lang="ts">
import { defineComponent } from 'vue'
export default defineComponent({
  name: 'svg-icon',
})
</script>
  <script lang="ts" setup>
import { computed } from 'vue'
const props = defineProps({
  prefix: {
    type: String,
    default: 'icon',
  },
  name: {
    type: String,
    required: true,
  },
  color: {
    type: String,
    default: '#333',
  },
  className: {
    type: String,
    default: '',
  },
})
const symbolId = computed(() => `#${props.prefix}-${props.name}`)
const svgClass = computed(() => {
  if (props.className) {
    return `svg-icon ${props.className}`
  }
  return 'svg-icon'
})
</script>
   
  <style>
.svg-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.1em;
  /* 因icon大小被设置为和字体大小一致，而span等标签的下边缘会和字体的基线对齐，故需设置一个往下的偏移比例，来纠正视觉上的未对齐效果 */
  fill: currentColor;
  /* 定义元素的颜色，currentColor是一个变量，这个变量的值就表示当前元素的color值，如果当前元素未设置color值，则从父元素继承 */
  overflow: hidden;
}
</style>